LMH6574

The LMH6574 from Texas Instruments is a high-performance analog multiplexer optimized for professional-grade video and other high-fidelity, high-bandwidth analog applications. It features a 4:1 input configuration, allowing it to select one of four buffered input signals based on the state of two address bits.

Key electrical specifications include a 500 MHz, 500 mV -3 dB bandwidth at an AV of 2, and a 400 MHz, 2 VPP -3 dB bandwidth, also at AV = 2. The device boasts a fast 8 ns channel switching time and 70 dB channel-to-channel isolation at 10 MHz. It offers excellent signal integrity with 0.02% differential gain and 0.05° differential phase errors. The gain flatness is 0.1 dB up to 150 MHz, and it provides a high slew rate of 2200 V/μs.

The LMH6574 operates over a wide supply voltage range from 6 V (±3 V) to 12 V (±6 V). It supports composite video applications with low distortion, exhibiting -68 dB HD2 and -84 dB HD3 at 5 MHz. An 80 mA linear output current is available for driving multiple video loads. The gain is set by external feedback and gain-set resistors for flexibility.

This multiplexer is available in a 14-pin SOIC package. Its capabilities make it suitable for applications such as video routers, multi-input video monitors, instrumentation, test equipment, receiver IF diversity switches, multi-channel A/D drivers, and picture-in-picture video switches.